Optimal Capacity Design for Solar-assisted CCHP System Integrated with Energy Storage

摘要

In this paper, a new system of solar-assisted combined cooling heating and power (CCHP) system equipped with energy storage is proposed. The model consists of most of the equipment which may be used in the distributed energy system, especially the concentrating solar power (CSP) plant which can store the solar power absorbed into large-capacity thermal storage device. Other energy storage devices are also taken into consideration in this system so as to store the surplus energy. Then a two-level optimization strategy for capacity design, which employs the group search optimizer (GSO) and CPLEX optimize, is constructed to improve the performance of this system in economy, energy and environment. The simulation results indicate that the proposed system is economic in investment and performs well in reducing pollutant emission as well as saving energy. Results also show that the photovoltaic has better performance in economy than CSP when large capacity energy storage equipment is needed.